Bottle-to-bottle transfer funnel



FIG. 1 is a perspective view of a bottle-to-bottle transfer funnel showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a bottle-to-bottle transfer funnel, as shown. 